Former Open champion John Daly, no stranger to controversy himself, has urged Vijay Singh to drop his lawsuit against the PGA Tour for "reckless administration and implementation" of its anti-doping program.

The PGA Tour has cleared three-time major winner Vijay Singh of doping offences after the World Anti-Doping Agency confirmed the deer antler spray the Fijian admitted to using was not "prohibited unless a positive test results".

Former world number one Vijay Singh pulled out of the Waste Management Phoenix Open before the start today after admitting he had used a deer antler spray which has previously been found to contain a banned growth hormone.

Vijay Singh charged into an early one-shot lead with a blistering finish to Thursday's opening round of the Greenbrier Classic at White Sulphur Springs in West Virginia as Tiger Woods made an erratic start.

All the latest news, views and interviews from the golfing world, including wins for Camilo Villegas, Gonzalo Fernandez-Castano and Vijay Singh and the debate about the next European Ryder Cup captain.